{
  "manageEntity": {
    "action": "Save",
    "entityId": "1776769656",
    "entityType": "Track",
    "nonce": "0xaacf83cc7976cbd4b07d0a16e2e959d59729400bf923cc852493eb86d1863185",
    "signature": "0x6dde4267d5667614819d29fb16b0191d199e61935f6d81df766b6ef1f593cced561d04c00c9e2e9ed34a72f05f7592bcc704f25443d0ec56a6487578ea7072f41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}